Captions not Working

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1

I have tried several different ways to get my captions to appear on my channel. I looked at the current method for enabling captions found in the blog post here: http://blog.roku.com/developer/2014/01/16/new-closed-caption-features-for-brightscript-developers/, and so I tried and this is what I came up with. I am using the Video Player example and so on my appVideoScreen I have this:

Function showVideoScreen(episode As Object)

    if type(episode) <> "roAssociativeArray" then
        print "invalid data passed to showVideoScreen"
        return -1
    endif

    port = CreateObject("roMessagePort")
    screen = CreateObject("roVideoScreen")
    screen.SetMessagePort(port)

    screen.SetPositionNotificationPeriod(30)
    screen.SetContent(episode)
    screen.Show()
	
    'Uncomment his line to dump the contents of the episode to be played
    'PrintAA(episode)

    while true
        msg = wait(0, port)

        if type(msg) = "roVideoScreenEvent" then
            print "showHomeScreen | msg = "; msg.getMessage() " | index = "; msg.GetIndex()
            if msg.isfullresult()
            	print "Video Completed Playback Normally"
            	RegDelete(episode.ContentId)
            	print "deleted bookmark for playback position"
            else if msg.isScreenClosed()
                print "Screen closed"
                exit while
            elseif msg.isRequestFailed()
                print "Video request failure: "; msg.GetIndex(); " " msg.GetData() 
            elseif msg.isStatusMessage()
                print "Video status: "; msg.GetIndex(); " " msg.GetData() 
            elseif msg.isButtonPressed()
                print "Button pressed: "; msg.GetIndex(); " " msg.GetData()
            elseif msg.isPlaybackPosition() then
                nowpos = msg.GetIndex()
                RegWrite(episode.ContentId, nowpos.toStr())
            else
                print "Unexpected event type: "; msg.GetType()
            end if
        else
            print "Unexpected message class: "; type(msg)
        end if
    end while

End Function

Function EnableCaptions(player as object) as void
            di = CreateObject("roDeviceInfo")
            captionsMode = di.GetCaptionsMode()

            if (captionsMode = "On")
                player.ShowSubtitle(true)
                player.ShowSubtitleOnReplay(false)
            else if (captionsMode = "Off")
                player.ShowSubtitle(false)
                player.ShowSubtitleOnReplay(false)
            else if (captionsMode = "Instant Replay")
                player.ShowSubtitle(false)
                player.ShowSubtitleOnReplay(true)
            endif
    End Function

and then I put the caption URL into my XML Document like this:

<item sdImg="http://dsoeehox1xjyp.cloudfront.net/roku/SHEPHERDS/images/series-images/7430-SD.jpg" hdImg="http://dsoeehox1xjyp.cloudfront.net/roku/SHEPHERDS/images/series-images/7430-HD.jpg">
		<title>Current Series Video 1</title>
		<contentId>1001</contentId>
		<contentType>episode</contentType>
		<contentQuality>HD</contentQuality>
		<streamFormat>MP4</streamFormat>
		<subtitleURL>http://selectbroadcasting.org/roku/examples/source/SHEPHERDS/CC/7430.srt</subtitleURL>
		
		<media>
			
			<streamQuality>HD</streamQuality>
			<streamBitrate>3000</streamBitrate>
			<streamUrl>http://dsoeehox1xjyp.cloudfront.net/roku/SHEPHERDS/video/7430_1080p-2928.mp4</streamUrl>
		</media>
		<media>	
			<streamQuality>HD</streamQuality>
			<streamBitrate>1800</streamBitrate>
			<streamUrl>http://dsoeehox1xjyp.cloudfront.net/roku/SHEPHERDS/video/7430_780p-1728.mp4</streamUrl>
		</media>
		<media>	
			<streamQuality>SD</streamQuality>
			<streamBitrate>1000</streamBitrate>
			<streamUrl>http://dsoeehox1xjyp.cloudfront.net/roku/SHEPHERDS/video/7430_480p-928.mp4</streamUrl>
		</media>
		<synopsis>Current Series of Bible Studies - part 1</synopsis>
		<genres>Bible Studies</genres>
		<runtime>3600</runtime>
	</item>

, and my Global Captions are enabled, and when I try to show caption tracks on my channel, it tells me there are no caption tracks available. Can someone please tell me what I am doing wrong?

Thanks!!